Question

why does lub dub sounds happen in heart

Answer 1

heart is taken expand and shoten action so that work make some sound that is it lub dub

Answer 2

♥Why does lub dub sounds happen in heart?

Solution:

Contraction of atrial chambers and then of ventricular chambers are 2 phases of systole.These two phases of systole can be heard as lub and dub sounds which are caused by the contraction of muscles and shutting down of valves.

•In the lub phase ,the ventricles contract and cuspid valves close.

•In the dub Phase, the pulmonary and aortic valves close.

hope it helps.

( note: this answer is not copied by goo gle)